Discontinued, recommended replacement is: TAU-PCI/2E1
The Tau/E1 is an adapter board for IBM PC and compatible computers with ISA bus. It includes two E1 interfaces operating at distances up to 1.5 km and one digital interface for a standby link. The adapter architecture is similar to the E1-XL dual modem.
Tau/E1 can be configured by software for three modes of operation: (see Block Diagram below).
The Cronyx-Tau software allows to join several physical synchronous communication channels into one logical channel. For example, two channels with data rate 1984 kbps, joined together, will create the logical channel with the overall throughput of 3968 kbps.
Configuration A: Dual E1 accsess unit. E1 Link 0 and E1 Link 1 operate independently and have identical data pathes to the PC memory. Data transfer rate is determined by the number of timeslots used.
Configuration B: Integrating multiplexer with one data channel and E1 sub-link. The timeslots of main link (E1 Link 0) are assigned to data channel and E1 sub-link. The data channel to/from PC memory is supported by HDLC Controller 0. E1 sub-link (E1 Link 1) translates user-defined timeslots to the remote node. This configuration allows to split the main link data between several chained Tau/E1 nodes (up to 30) with the distance between nodes of up to 1.5 km. The Digital Interface and HDLC-Controller 1 create independent sync/async channel operating at data rates up to 4 Mbps.
Configuration C: Integrating multiplexer with two data channels and E1 sub-link. The timeslots of main link (E1 Link 0) are assigned to two data channels and E1 sub-link. Two data channels to/from PC memory are supported by HDLC Controllers 0 and 1. E1 sub-link (E1 Link 1) translates remaining timeslots to the remote node. This configuration allows to split the main link data between several chained Tau/E1 nodes (up to 15) with the distance between nodes of up to 1.5 km. For this configuration the Digital Interface is disconnected.